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RAM | STAAD | ADINA Wiki Red Status Lights for Lateral Load Cases in RAM Frame
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    Red Status Lights for Lateral Load Cases in RAM Frame

       
      Applies To 
       
      Product(s): RAM Structural System; Ram Frame
      Version(s): Any
      Area:  Analysis
       

    Problem Description

    Red status lights are shown to the left of wind and seismic load cases in RAM Frame - Process - Analyze. These load cases cannot be analyzed.

    Reason

    When wind and seismic load cases are defined to use the calculated frequency and period, the program is required to run an Eigen Analysis to find the fundamental frequency and period for each direction. If there is insufficient information to solve the Eigen Analysis, red status lights will be displayed on the left of the load case and you will not be able to include them in the analysis.

    Two common reasons for the red status lights:

    • All diaphragms in the model are defined as Flexible diaphragms.
    • One or more diaphragms in the model has 0 mass (or very small values of mass and mass moment of inertia). Verify this in RAM Frame - Loads - Masses.
    • There are no lateral members connected to any diaphragms in the model.

    Steps to Resolve

    Consider using one of the following to work around this issue:

    • If all levels are Flexible, use nodal lateral loads modeled in RAM Modeler to account for the lateral loads. Program generated load cases do not apply to flexible diaphragms.
    • Use a specified frequency and/or period instead of the calculated values. When this is done, an Eigen Analysis is no longer required.
    • Make sure that each diaphragm has non-zero mass. Self-mass options are defined in RAM Manager - Criteria - Self-Weight. You can also use specified mass values in RAM Frame - Loads - Masses

    See Also

    Red Lights for Load Combinations in Ram Frame

    Structural Product TechNotes And FAQs

    RAM Frame Troubleshooting

    RAMSS Eigenvalue Error

    RAM Frame - Masses

    • RAM Frame Analysis
    • SELECT Support
    • masses
    • RAM Structural System
    • Seismic Loads
    • Wind Loads
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    • Cancel
    • Karl G Created by Bentley Colleague Karl G
    • When: Thu, Aug 15 2013 4:25 PM
    • Seth Guthrie Last revision by Bentley Colleague Seth Guthrie
    • When: Tue, Aug 24 2021 11:07 AM
    • Revisions: 9
    • Comments: 0
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